Shock-absorber.



/Minnesotzn UNITED STATESy PATENT OFFICE.

rfrnomn soHIMMnL, or FARIBAULT, MINNEsorAf SHOCK-ABSORBER.

n Specification of Letters Patent. Application Ied-Jfnuary 1914. SerialNo. 811,206.

Patented oct. 2o, 1914..

To all whom/@Vt may] concern.'

Be it known Vthat 1,FR1D0LIN SCHIMMEL, ofFaribault, Rice county, in theState of havfe invented certain new and useful Improvements in-Shock-Absorbers, of which the foulo'wing is a specification, referencebeing made to the accompanying drawing, forming'a part hereof.

The improvements are concerned more particularly with frictional shockabsorbers so constructed that the friction between the rotating memberswill be graduated in amount as the arms of the shock absorber are movedin either -direction away from their normal position; the object of sucha device being to retard the movement of the spring` system of anautomobile or the like but little when the vehicle is traveling overrelatively smooth roads and to proportionately increase the retardingeffect when traveling over rutty roads.

The present invention relates to improvements in that type of shockabsorber and consists of an improved construction whereby severaladvantages are secured which will be .more particularly set forthhereafter. l

In the accompanying drawings Figure 1 is an 'assembled view of a deviceembodying the'v invention. Fig. 2 is an elevation of onefthearms. Fig. 3iS a similar elevation of tl1e"`other arm. Fig. 1- is a plan of the armshown in Fig. 2. Fig. 5 shows the spring 12 provided for radiallyextending the concentric rings. Figs. 6 and 7 `show the concentricrings.

The shock absorber includes as usual two arms, 1 and 2. he arm 1 isformed with an annulus 3 which is provided with a central pin 4 and atapered recess The arm 2 is provided with an enlarged .lace G, whichserves as a cap for the annulus 3. This arm is also provided with acentral lug or projection 7 adapted to engage the pin and a taperedrecess 8. Housetl in the annulus 3 I provide a plurality of spring rings9. Interposed between these spring rings may be-rings of special fabricconstruction, brake lining, or similar material. 10. Each of the springrings 9 is provided with lips or lugs 11 which extend out from thesurface of the rings so as to engage the tapered recesses 5 and 8 of thetwo arms 1 and 2. In order to increase the friction between the rings Iprovide a spring member 12 with ends 13 adapted to go in between theends 14 of the interior concentric ring, thus spreading the concentricspring rings with a greatery radial force. tr1c spring rings areinserted in the housing so that every other ring 11 on the same sideadapted to be engaged by the tapered recesses 5 and 8. It will bereadilyeunderstood therefore that when the elbow is moved these adjacentconcentric rings moving in opposite directions will retard the movement.The object of the tapered recess is to bring these adjacent rings intomotion step by step. When the smallest portion of the tapered recessengages one of the lugs, it moves its ring before the gradually widerportion of the taper comes in contact with the lug of the next radialring. By this method the various concentric rings are moved one at atime with increasingly frictional area brought into play. The two armsare securedby the usual washers and nuts l5.

In attaching the shock absorber to a/ vehicle the ends 16 and 17 of thearms 1 and 2 are connected up in the usual nrimer.

no fixed neutral design to be changed for every type of vehicle and forevery load. This shock abdition. Finally it vwill be observed thatthepresent improvement provides an exceedingly simple construction for theembodiment of the type of shock absrberhcre inl question. v i

I claim l' l l. In a shock absorber 4of the class de-y scribed,` afriction joint comprising-a numvber of rings of frictional materialvinterposed hetween radially expanding concentricrings arrr iged so thatfriction is ebtaiiel on both. sides of the frieten rings and springrings.

2. Iii a sheet: absorber of the class described a friction jointcomprising-a number of friction rings interposed? between spring ringscoaxially housed so that frictional contact is had on both sides betweenthe friction rings and spring rings.A

3. In a shock absorber of the class described a friction jointcomprising a number of friction rings interposed between spring ringsarranged so that friction is obtained on both sides of the frictionrings and spring rings, means to move the rings coaxlally in oppositedirections,

These concenhas its projection As will be readily understood, there willbe j point which requires the sorber adjusts itself for everyvaryingscontlf) v il. In a shock absorber of the class described havingtwo arms which are jointed together to form an elbow, a friction jointcomprising a number of friction rings interposed between spring membersarranged so that friction is obtained on both sides of the frictionrings and spring rings, means to move the rings by the opening orclosing of the elbow. j

5. In a shock absorber having two arms which are jointed together toform an elbow, thecombination of a plurality of spring rings housedconcentric with the joint, friction rings interposed between thespringrings and means to increase the expansion of the spring rings to coactwith Aythe friction rings on both sides. 6. In a shock absorber havingtwo ati taching arms jointed to'form an elbow, one

of the arms being formed with an annulus ati the jointed end adapted toreceive a plurality of concentric rings, a; plurality vof spring ringsinterposed between rings,'"the other arm formed at one end' to 'cap'over the annlus forming a housing for the joint, means to expand thespringvrings against.

the friction rings, means for coaxially moving thc adjacent spring ringsin opposite direction.

7 In a shock taching arms jointed to form an elbow, one of the armsbeing formed with an annulus at the jointed end and adapted to receive aplurality of concentric rings. the other arm formed to cap over theannnlus providing a housing for the joint, means to expand the ringsradially, means connected with the arms to move the adjacent concentricrings coaxially in opposite directions. j

8. In a shock absorber having two attaching arms jointed to form anelbow, a plurality of concentric spring rings, means to move theconcentric spring rings separately and in opposite directions coaxially.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

FRIDOLIN SCHIMMEL.

Witnesses l I i J. W. LE CRONE, ROBERT absorber having two att

